Due to poor lubrication or lubrication system failure, it will cause heating, burning and holding shafts in the parts of the transmission parts, causing the parts of the rolling or sliding parts to be damaged and forced to stop repair.
Due to not carry out daily inspection and maintenance, the wear parts, transmission parts of rolling and sliding parts and wear failure to check in time, could not be repaired correctly according to the degree of mechanical wear, caused by the damage of the components was forced to shut down for repair.
Due to the vibration of the elevator during operation, the fastening bolts are loose, which causes the parts to displace and lose the original precision, and can not be repaired in time, causing the grinding, collision and crash parts to be stopped and repaired.
Due to the difference between the elevator balance coefficient and the standard, it causes the overload elevator car to squat or flush. When the roof is pushed, the speed limiter and the safety tongs act, forcing the elevator to stop running and waiting for repair.
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